ul,
h1,
h2,
h3,
p,
body {
    padding: 0;
    margin: 0;
}

.clearfix {
    *zoom: 1;
}

.clearfix:after {
    display: table;
    content: '';
    clear: both;
}

ul {
    list-style: none;
    padding: 10px;
}

h1 {
    text-align: center;
}

h2 {
    padding: 10px;
}

#main {
    margin-top: 150px;
    min-height: 400px;
}

.head,
.ft {
    padding: 10px;
    color: #fff;
    background-color: #3fa156;
    font-size: 30px;
    text-align: center;
}

.head {
    margin-top: 150px;
    margin-bottom: 10px;
    background-color: #a31e39;
}


/*基类*/

.module-a,
.module-b,
.module-c {
    margin-bottom: 10px;
    color: #fff;
}

.module-a {
    background-color: #39b3d7;
}

.module-b {
    background-color: #f0ad4e;
}

.module-c {
    background-color: #d9534f;
}